Parallel Ion Exchange Cartridges for Low Pressure Drop
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Solution Overview
Problem
Conventional ion exchange reactors experience significant pressure drops due to tortuous flow paths, limiting control over ion removal, electric resistivity, and pH, and are inefficient at varying ion concentrations.
Innovation Solution
The ion exchange reactor design features two cartridges positioned parallel to the flow direction with spaced fluid passages between them, allowing for variable ion removal rates and low pressure drop by controlling the interfacial surface area and diffusion distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional ion exchange media are closely packed to maximize ion removal efficiency, then ion removal efficiency is improved, but pressure drop increases significantly
Solution Approach 1:
The ion exchange media is segmented into discrete cartridges rather than being continuously packed. Multiple cartridges are arranged in parallel, allowing fluid to flow through multiple pathways simultaneously. This segmentation maintains sufficient ion exchange surface area while reducing flow resistance compared to continuous close packing.
Solution Approach 2:
The invention transitions from a single-dimension close-packed structure to a multi-dimensional parallel cartridge arrangement. Cartridges are positioned in parallel along the flow direction with spacing between them, creating a three-dimensional configuration that maintains contact area while improving flow dynamics and reducing pressure drop.
2Productivity
If conventional reactors remove essentially all ions from fluid, then ion removal completeness is improved, but control over electric resistivity and pH is limited
Solution Approach 1:
The ion exchange process is made dynamic and adjustable rather than static and fixed. By controlling the number of cartridges, their spacing, and their positioning, the system can be adjusted to remove different proportions of ions, thereby controlling the final electric resistivity and pH levels according to specific process requirements.
Solution Approach 2:
The system allows changing key parameters such as the number of cartridges, cartridge spacing, and flow distribution to achieve different ion removal levels. This parameter adjustability enables precise control over the final ion concentration, electric resistivity, and pH of the treated fluid.
3Speed
If larger pumps are used to overcome pressure drop in conventional reactors, then fluid flow is maintained, but system size and expense increase
Solution Approach 1:
By segmenting the ion exchange media into multiple parallel cartridges, the system reduces the resistance to fluid flow. This segmentation allows standard pumps to effectively drive fluid through the reactor without requiring oversized pumps, thereby controlling system size and cost while maintaining adequate flow rates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves controlled ion removal, maintains desired electric resistivity and pH levels, and reduces pressure drop, making the system more efficient at high ion concentrations while being less efficient at low concentrations, thus optimizing ion exchange performance.
Implementation Method 1
at least one cartridge having an ion exchange material therein for removing the ions from the fluid
Implementation Method 2
minimize a diffusion distance that the ions must travel through the water to the ionically active surfaces
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An ion exchange apparatus (18) includes at least one fluid passage (38) that extends between an inlet (32) and an outlet (34) for transporting a fluid having ions therein. At least one cartridge (36) includes an ion exchange material and the cartridge has an ion removal rate of removing the ions from the fluid that varies in response to a concentration of the ions in the fluid.